Continuous-baking oven



Mar. 27, 1923,

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. w. ENGLAND CONTINUOUS BAKING- OVEN Filed Mar. 25, 1922 4 sheetshefit 4 2 X .W Kai/ l it 93 an:

Patented Mar. 27, 1.923%

UNITED STATES PATENT OFFICE.

ISAAC W. ENGLAND, "OF PASSAIC, NEW JERSEY, ASSIGNOR TO PASSAIC METAL WARE 00., OF PASSAIC, NEW JERSEY, A CORPORATION OF NEW JERSEY.

CONTINUOUS-BAKING OVEN.

Application filed March 23, 1922. Serial No. 545,948.

T all whom it may concern:

Be it known that I, ISAAC vV. ENGLAND, I a citizen of the United States, and resident of Pamiac, in the county of Passiac and State of New Jersey, have invented cer tain new and useful Improvements in Continuous-Baking Ovens, of which the following is a specification.

My invention relates to improvements in baking ovens in which articles are carried therethrough for a desired period of time to bake the articles, and my invention is particularly applicable to ovens through which lithographed sheets of metal are carried for the purpose of drying the ink on the sheets.

Objects of my invention are to conserve the heat required for drying or baking the articles; to prevent products of combustion from engaging the articles being dried or baked; to provide improved means to 0perate from a printing press for printing the sheets a conveyer to carry the sheets through the oven, as well as to permit operation of '25 the conveyer independent of the printing press, and generally to simplify and improve the construction of the" class of ovens referred to.

My invention comprises novel details of improvement that will be more fully hereinafter set forth and then pointed out in the claims.

Reference is to be had to the accompanying drawings, forming part hereof, wherein Fig. 1 is a side view of my improved oven;

Fig. is an enlarged side view including a portion shown in Fig. 1, illustrating the relation of a printing machine to the oven, to be read in connection with the Fig. 1;

Fig. 3 is a side view, partly in section, looking from the side opposite Fig; 1 and from the right-hand side of Fig. 4;

Fig. 4 is an end view, looking right-hand side of Fig. 1;

Fig. 5 is a fragmentary sectional plan view taken on line 5, 5, in Fig. 6;

Fig. 6 is a vertical line 6, 6, in Fig. 1;

Fig, 7 is a section on line 7, 7, in Fig. 6;

Fig. 8 is a fragmentary plan view, illustrating a portion of a .warm air pipe and its connection with the oven;

Fig. 9 is an enlarged detail plan view of a form of nozzle for directing a cold air blast from the section, enlarged, on

against sheets at the delivery end of the oven;

Fig. 10 is an enlarged sectional View on line 10, 10, in Fig. 4;

Fig. 11 is an enlarged section on line 11, 11, in Fig. 4; and

Fig. 12 is an enlarged fragmentary section on line 12, 12, in Fig. 11.

Similar numerals of reference indicate corresponding parts in the several views.

The oven 1 may be of any suitable or usual construction, shown comprising an elongated chamber 2 open at opposite ends. The main walls of the oven may comprise asbestos or other non-heat conducting material. A conveyer 3 travels, at its upper run, through the oven in an endless manner and is shown comprising endless chains spaced side by side and supported upon sprocket wheels 4, 5, journaled upon spaced brackets at the receiving end of the oven and sprocket wheeels 6 at the delivery end of the oven. The wheels 4 are shown carried upon shaft 7, (Fig. 4), by means of which the conveyer can be operated. The conveyer chains are shown provided with supports 8, suitably spaced apart along the conveyer, being shown provided with arms 8 extending from the spaced chains, and the outer portions of said supports are shown provided with hook-like members 8" to retain sheets or plates 9 to be fed to the conveyer, (Fig. 2). In the example illustrated the lower run of the conveyer is below the bottom wall 1 of the oven, (Fig. 6).

A lithographing or printing press is indi-.

cated at 10, which may be of any suitable or usual construction adapted to lithograph or print upon the sheets 9, endless conveyer 11. extending from the printing press being adapted to deliver the lithographed or printed sheets successively to the advancing supportsS on conveyer 3, in a well known manner. A motor 12, such as an electric motor, may be used to operate the press,

\ (Fig. 2.

I provide heating means within the oven, located between the upper and lower runs of conveyer 3, so that heat will be confined within the oven above its bottom 1*, below the articles or sheets 9 carried by the upper run of the conveyer. The heating means I have illustrated comprise gas burners 13 and communicating metal compartments or 1 and 6).

boxes 14 suitably supported within. the oven and heated air to the outlet'pi-pe 1.6 for the latter, (Figs. 5,6 and 7.). Thelower wall of box 14, around the gas burner, is shown open at 14 (Fig. 7 and below the burner is a trunk or box 17, open at one end at'17 (Figs. 6 and 7), to receive heated air. There may beany desired number of series of burners and air boxes arranged transversely across the oven and suitably spaced apart, and their exhaust pipes 16are shown cone.

nected t a-pipe' or'manifold 17, which is shown provided withanoutlet pipe 18, com= municating with a suction pump or blower 19 that maybe operated by motor 20, where.-v

by heated products of combustion are kept from the interior of the oven and draft through the heating boxes is provided, (Figs. Gas may be conducted to the burners 13 by gas pipes 21, and air for said burners may be conducted through pipes 22 which may communicate with a pipe or, header 23 shown connected by pipe 24 with 30 a blowe'r25 that maybe operated by motor 26 to force airtothe burners for the mix ture. In order to exhaust gases from the oven that may arise from the articles being baked-I provide a pipe 27 communicating sirable to quickly cool such articles, whichwith the interior of the oven, which pipe communicates throughpipe 28, with an ex- -haust pump or blower 29, having delivery .pipe29", which blower may be operated by a motor to exhaust gases from the oven, preferably at the upper part of the'latter, (Fig.6). Qne o'r moredampers 30- m ay be provided in pipe-27 to'c'ontrol the exhaust therethrough.

When the articles emerge on the conveyer from the rear of the oven it may be deis particularlyd'esirable when metal plates have been baked or heated in the oven.

.(Fig. with apertured air distributor side walls 1 I provide means to blow air againstsuch plates and to utilize such air in the heaters. For such purpose I provide an 9 air blower 31 (Fig; "1), whose delivery pipe 32 deliversair'between the runs of'the-conveyer beneath the. articles therebetween, I have shown pipe I 32' provided 33, (Figs. 3 and 9), located within a chamber formed by at the delivery end of the oven with hood 1thereov'er. The top of the hood is shown connected by pipe 34 with asuction pump 'orblower 35 from which a delivery. pipe 36 extends along the oven (Figs.' 1 and 6). Blowers 31 and 35 may be respectively operated by the suitable inotors 37,, 38, (Fig. 1). Theair delivery pipe 36 is shown provided with branches 36 whichmay have dampers 39, (Figs. 6, 7 and 8), the branches" sorb heat from such articles, and such heat ed air will be blown through pipe 36 to the heaters, preferably to theburners 13 to prowide the same with heated air forcombus- 'tion, whereby the heat of the articles 9 passing'from the'oven is conserved and returned to the burners in the nature reduce gas consumption. V The means I have shown for operating conveyer 3 enables the conveyer to be oper ated byand with the printing press, or in-. 1 dividually thereof at will. v

' Shaft 7 is shown provided with a worm wheel '40 in mesh with a worm 41 on shaft 42 journaled in housing 43, secured upon the oven, (Figs. 4 and 10).. Shaft 42 has a gear 44 in mesh with gear .45 on shaft 46. The upper end of shaft 46 is provided with a gear 47 in mesh with a gear 48 on shaft 49, said gears being shown inclosed within a housing 50, suitably supported, as upon the ceiling, (Fig. 2). A shaft 51 may be driven by an electric motor 52, (Figs. 2. and 4). which shaft is provided with a worm 53 (Fig. 11) in me sh with a worm wheel 54, loose on shaft 49. Worm wheel 54'is provided with a spring pressed dog 55. (Figs. 11 and 12), adapted to coopof heated "air to erate witha disc 56 secured to shaft 49, as.

by key 57, which disc is provided with a peripheral notch or recess 56 to be engaged by dog 55 when the dog is carried around by wheel 54. Disc 56 is shown united to a disc 58, Fig. 11), which disc is provided with a notch 58 adapted to be engaged by a spring pressed dog 59 pivotally carried by an arm.

to motor 52. (Figs. 4 and 11) Shaft 61is shown provided with a gear 62 (Fig. 2) in driven by the printing press, as by meansof which may be suitably support-ed adjacentv mesh with a gear 63 on shaft 64- that '-is .gear 65-,on said shaft meshing with a drive.

gear 66 of the printing press.

The arrangement described is such that" Whenshaft 61 is driven by the printing press; its arm 60' will rotate the dog. 59,-

which will engage notch 58 of disc 58fto rotate the latter and shaft 49, with disc 56: c

meanwhile rotating freely with respect to dog 55;. so that worm wheel 54 will not be rotatedt; The rotation of shaft 49 drives gear 48$ which through gear 47, will rotate shaft 46 to actuate shaft 7 through the gear-.

ing shown in Fig. 10, to operate the con- "eyer. The movement of the conveyer, through the gearing described, in conjunction with the operating of the printing press, will be such that, as lithographed and printed sheets 9 are delivered from the press such sheets will be successively delivered toan advancing support 8 of the conveyer, so that the lithographing or printing of the plates and the feeding of the same to the conveyer are successive andcontinuous. In case it be desired to operate the conveyer without regard to the operation of the printing press, the motor 52 is started for rotation of shaft 51, whereupon worm 53.will rotate wheel 54, whose dog 55 will engage notch 56 of disc 56, to cause rotation of shaft 49; to drive the conveyer through shaft 46 and the gearing previously described with reference to said shaft, the rotation of disc 58 with disc 56 in relation to dog 59 being such that said dog will not be operated, shaft 61 will be idle, and the printing press will not operate by reason of the motor 52 and the devices operated thereby. It will be understood that'the conveyer may be operated by motor 52 at any desired speed irrespec-' tive of the speed at ,which the conveyer would be operated by the press, and it will also be understood that, if desired, by properly speeding motor 52 the conveyer may be.

operated by such motor at a speed greater than the corresponding feed of articles by the press, 50 that the articles delivered to the conveyer from the press may be passed through the oven at a speed greater, by means of motor 52, than would be the case if the conveyer were driven by and with the press, which may be found useful in some classes of lithographing or printing on certain plates or other articles.

My improvements enable the continuous operation of lithographing or printing and baking metal plates at any desired speed without requiring the plates to be manually handled before they are baked, and with a minimum of expense for fuel, by reason of the placing of the heaters directly under the upper run of the conveyer, above the lower run of the conveyer, housed within the oven,

and the feature of cooling the plates by a blast of air and utilizing the air heated by the plates to aid in the combustion of the gas in the heaters.

Having now described my invention. what I claim is z 1. The combination of an oven open at opposite ends, with an endless conveyer having a portion passing through the oven, said conmeans to force air through said chamber against the heated articles on the conveyer, a pipe communicating with said chamber, a blower communicating with the pipe to exhaust heated air from the chamber, and means connecting the heating means with said blower to conduct said heated air to the heating means.

3. The combination of an oven open at opposite ends, an endless conveyerprovided with supports adapted to travel through the conveyer, heating means for the oven, a chamber at the delivery end of the oven, means to force air through said chamber against the heated articles on the conveyer, a pipe communicating with said chamber, a blower communicating with the pipe to exhaust heated air from the chamber, the heating means having an air receiving opening, and a pipe connected with the blower and having an outlet to deliver heated air to said opening of the heating means.

e1. The combination of an oven openat opposite ends, an endless conveyer provided with supports adapted to travel through the conveyer, heating means for the oven, a chamber at the vdelivery end of the oven, meansto force air through said chamber against the heated articles on the conveyer, a pipe communicating with said chamber, a blower communicating with the pipe to exhaust heated air from the chamber, the heating means having an air receiving opening, and a pipe connected with the blower and having an outlet to deliver heated air to said opening of the heating means, said heating means comprising a plurality of boxes in connection at adjacent ends, and a pipe connected with one of said boxes and having a delivery without the oven to discharge products of combustion from the heating means.

5. The combination of an oven inclosed on all sides and open at the ends, an endless conveyer having an upper run passing through the oven anda lower run passing beneath the oven, heaters within the oven beneath the upper run of the conveyer, said heaters comprising chambers and gas burners therein. means to supply gas and air to said burners. and pipes connected with said heaters within the oven and opening without the oven to carry ofi' products of combustion from the heaters to prevent the same from entering the oven.

6. The combination of an oven inclosed on all sides and open at the ends. an endlessconveyer having an upper run passing through the oven and a lower run passing beneath the oven. heaters within the oven beneath the upper run of the conveyer, said heaters comprising chambers and gas burners therein, means to supply gas and air to said burners,

IUD

and pipes connected with said heaters with in the oven and opening without the oven to carry off products of combustion from the heaters to prevent the same from entering the oven, a chamber adjacent to the delivery end of the oven, closed at its outer sides and open at its ends for the passage therethrough of'the conveyer and articles thereon, means to force air into the chamber beneath the articles on the conveyer to cool the articles and heat the air, and means to conduct said heated air from the chamber above the articles therein and deliver said heated air to the heaters.

7 The combination of an oven inclosed on all sides andopen at the ends, an endless conveyer having an upper run passing through the oven and ailower run passing beneath the oven, heaters within the oven beneath the upper run of the conveyer, said heaters comprising chambers and gas burners therein, means to supply .gas and air to said burners, and plpes connected with said heaters within the oven and opening without theoven to carry off products of combustion from the heaters to prevent the same from entering the oven, a chamber adjacent to the delivery end of the oven, closed. at its outer sides'and open at its ends for the passage therethrough of the conveyer and the articles thereon, means to force air in to the chamber beneaththe arti- -cles on the conveyer to cool the articles and heat the air, a pipe connected to the upper part of said chamber, a blower connected with said pipe, .and a pipe communicating with said blower and provided with branches communicating with said heaters to deliver said heated air thereto.

8. The combination of an oven "open at opposite ends, a conveyer to operate in the oven, a'printing press adjacent to the conveyer, means to deliver printed articles from I the press to the conveyer, transmission devices between the press and the conveyer for operating; the latter by the forn1er,a motor independent of the press, and means includsaid motor to operate the conveyer lIIdBPGIId? ently of the press.

9. The combination of an oven open at ed in said transmission devices operable by I opposite ends, a conveyer to operate in the comprising gearing operated by said motor independently of said transmission de- 1 vices, notched discs rotatively connected with a shaft of said transmission devices, said gearing having a dog cooperative with one of saidnotched discs, another shaft of said transmission devices having a dog cooperative with the other notched disc whereby the last named shaft may rotate the first named *shaft andthe latter may be rotated by the of said other shaft for a driving, the conveyer.

motor independently v 10. The combination of an oven having open ends, a conveyer operable through the oven, a printing press adjacent to thereonveyer, means to transmit printed articles from the press to the conveyer, a shaft to be driven by the press and pro vided with an arm having a dog, a second shaft provided with notched discs, one of said discs being cooperative with said dog, a toothed wheel loose on the second named shaft'and provided with a dog cooperative with the other notched disc, ashaft provided with means to rotate said toothed wheel, .a motor independent of the press to actuate the last named shaft, and gearing operable by the second named shaft to actuate the conveyer.

Signed at Passaic, in the county of Passaic, and State of New Jersey, this 26th day of December, A. D..,1921.

' ISAAC W.ENGLAND;- 

